I have a Cocopa USB 3.0 External CD Drive, CD/DVD-RW Drive, CD-RW Rewriter Burner. It plugs into the USB port and the power lights up and the disc turns, but it does not appear in "Finder" . The player works fine plugging it into a USB port on an older Mac laptop.

Many (or all) HDMI to Dual Link DVI-D adapters do not actually support Dual Link signals. The female Dual Link DVI-D connector of those adapters has a receptacle that accepts a Dual Link male cable (more pins than Single Link cable), but only the Single Link signal is passed (because HDMI is Single Link). They don't do any conversion at all.

You need a USB-C to mini DisplayPort female adapter. Then you can connect an Apple Mini DisplayPort to Dual-Link DVI Adapter. You can tell it's a real Dual-Link adapter because it requires extra power which it gets using a USB connection.

You could also use the mini DisplayPort output of a Thunderbolt 3 dock such as the OWC Thunderbolt 3 Dock.

Or you could use the mini DisplayPort output of a USB-C dock. Some support 4K 30 Hz and USB 3.0. Others may support 4K 60 Hz but only USB 2.0 (because USB-C is slower than Thunderbolt 3 so it can't support both 4K 60 Hz and USB 3.0). Either will work with 2560 x 1600 60 Hz.

The Thunderbolt 3 ports of the iMac and MacBook Pro support both USB-C docks and devices and Thunderbolt 3 docks and devices.

Can another USB-C adapter be plugged into the USB-C port on this adapter so that you could, for example, add another display, or add another USB port? You might need another USB port if it turns out that the USB SuperDrive will only work if plugged directly into the USB port on the first adapter and you'd like to have another USB device plugged in. Being able to daisy-chain these adapters would provide a way (although an inefficient one) to add USB and other ports beyond what's available on the existing adapters.

I got my answer by going into an Apple store and testing. The answer is no. The USB-C port on these adapters are strictly for power input. They can't carry data in either direction.

Also, the original reason that I asked the question was specifically to find out if it would be possible to add another USB 3.0 port (with type A connector) while a SuperDrive was plugged into the USB port on this adapter. The SuperDrive will not work in any other configuration with the new 12" Retina MacBook (that is, it won't work with any hub). So the answer, again, is no: if you want to use a SuperDrive with a new MacBook, it will consume the only USB port, and no other USB devices can be used at the same time.

No, daisy-chaining multiple USB-C Digital AV Multiport Adaptors is not possible because the USB-C port on the adapter can only pass through power from a charger to the MacBook. It is not a full featured, bi-directional USB-C port. Power passthrough only.

I would like to know some information regarding the USB-C Digital AV Multiport Adapter, I would like to know if I would use it for my IMAC 21.5 inch, would I be able to connect my PS3 to the IMAC and use the IMAC as a display.

I have the new LG UltraFine 4K display that includes only USB-C input. Can I use this adapter to convert the HDMI output from the MacBook to the DisplayPort Alt-Mode USB-C connection on the 4K monitor? Or do I need to convert USB-C to DisplayPort 1.2 to successfully connect the MacBook?

If it's a MacBook or 13" MacBook Pro, yes the USB-C Digital AV Multiport Adapter can charge it. However the 15" MacBook Pro needs a full 85W to be able to operate fully *and* charge the battery, so if you have that model you will NOT be guaranteed a battery charge through this adapter. After being very frustrated by my laptop not charging I finally found support doc HT207256: "MacBook Pro can receive a maximum of 60W of power through the Apple USB-C VGA Multiport Adapter or USB-C Digital AV Multiport Adapter. For the best charging performance on MacBook Pro (15-inch, 2016), connect the power supply directly to your Mac."

One of the reviewers for this product has stated that it is not HDCP compliant, which means that it would not be able to transmit netflix or other copyrighted material via HDMI. This seems like a massive oversight and my first instinct is to believe the reviewer had hooked his setup up improperly. Can anyone confirm whether or not they have been able to stream Netflix or other copyrighted material to TV's connected through HDMI?

Currently, you can't. Which is sort of weird. My wife uses the Apple 27" LED cinema display (the one with a mini display port connection, not the Thunderbolt version) with a 11" macbook air and it works great - she needs the large screen for working at home, but also the lightness and portability of the small laptop for on-the-go use. We were hoping to upgrade to the new 12" macbook. It's a great machine (road tested one at the Apple Store in SoHo) in almost every respect...even lighter than her 11" Air, bigger screen, sufficiently powerful. But until she can connect it to her 27" display, no sale. Hopefully Apple or someone else releases an adapter soon (USB C to Mini display port). Far as I know there's no technical reason why such an adaptor couldn't be produced.

It works that way for me with the 15" MBP 2016 w touch bar. I have the adapter plugged into the MBP, and a (powered) USB hub plugged into the USB-A port on the adapter. All the devices plugged into the hub work fine.

I have a MacBook Air that I have connected to my 26" Apple Cinematic display (with speakers) (pre-Thunderbolt). Will this or another cable allow me to use the new MacBook in clamshell mode with my display?

The USB-C Digital AV Multiport Adapter can only deliver 60W so the 15" MacBook Pro will NOT charge AT ALL if it is also being used heavily. I had this problem. Finally I found support doc HT207256: "MacBook Pro can receive a maximum of 60W of power through the Apple USB-C VGA Multiport Adapter or USB-C Digital AV Multiport Adapter. For the best charging performance on MacBook Pro (15-inch, 2016), connect the power supply directly to your Mac."